90988864 has 28 divisors (see below), whose sum is σ = 181380384. Its totient is φ = 45286784.

The previous prime is 90988847. The next prime is 90988867. The reversal of 90988864 is 46888909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90988867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11397 + ... + 17659.

Almost surely, 2^90988864 is an apocalyptic number.

It is an amenable number.

90988864 is a deficient number, since it is larger than the sum of its proper divisors (90391520).

90988864 is a wasteful number, since it uses less digits than its factorization.

90988864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502 (or 6492 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 90988864 is about 9538.8083113144. The cubic root of 90988864 is about 449.7757961322.

The spelling of 90988864 in words is "ninety million, nine hundred eighty-eight thousand, eight hundred sixty-four".